Johjst hobflee



(No Model.)

J. H'OE PLER.

FEED MECHANISM FOR SEWING MACHINES.

Patented Dec. 30, 1884.

it N E rare arena rricei JOHN HOEFLER, OF ILION, KEW YORK.

FEED MECHANISM FOR SEWlNG-lVlACl-MNES.

SPECIFICATION forming part of Letters Patent No. 309,950, dated December30, 1884:.

Application filed April 19, 1884. (X0 model.)

To (tZZ whom, it 71mg concern:-

Be it known that I, JOHN Honrnnmof Ilion, in the county of Herkimer andState of New York, have invented certain Improvements in Feed Mechanismfor Sewing-Machines, of which the following is a specification.

This invention has reference to improvements in that class of mechanismin which a four-motion feed-bar is connected to and operated by one endof a lever which has a vibratory and also a longitudinal motion.

The improve1nent,which consists in a swivcling connection between thefeed-bar and lever, is designed more particularly for application to thefeed mechanism described in Letters Patent granted to me on the 29th dayof July, 1879,'No. 217,872; but is also applicable to all machines whichhave a swinginglever to impart an upward and a forward motion to thefeed-dog. The downward and rearward motions are effected by means of thebar or by means of springs.

In the accompanying drawings 1 have represented the invention asembodied in connection with so much of the feed mechanism of the patentreferred to as is necessary to an understanding of the improvement.

For such details of the mechanism as are not herein described referencemay be had to the original patent.

Referring to the accompanying drawings, Figure 1 is aside elevation ofthe feed barand dog, with my swivel applied thereto. Fig. 2 is a topplan view of the same. Fig. 3 is a side elevation of the swiveling-blockdetached. Fig. l is a top plan view of the same. Fig. 5 is a bottom planview of the bed-plate of the machine, and of such parts of the mechanismwhich co-operate with my improved devices.

Referring to the drawings, A represents the bed-plate of the machine; B,the horizontal feed-bar, located thereunder, and provided with the usualfecd-dog, 0, having a serrated or toothed upper surface, which isprojected through and above the bed-plate.

D represents a horizontal lever, located beneath the bed-plate, andarranged to receive both a vibratory and alongitudinal movement, as inthe original Letters Patent before mentioned. In the machine asoriginally constructed one extremity of thislever, provided with a wedgeon its upper surface, was arranged to enter a transverse notch or recessin the under side of the feedbar,for the purpose of imparting motionthereto. Instead of this arrangement I now intcrpose between the wedgeon the feed-bar and the actuating-lever a swiveling-yoke orbearing-plate,E. It will be observed that this yoke is forked or dividedto admit the end of the lever, and is provided with a vertical neck orjournal, at, which is seated in a corresponding hole formed in thefeed-bar, the bar being enlarged to avoid an undue reduction of itsstrength. The journal of the swivel is arranged to turn closely butfreely in the feed-bar, and the lever arranged to slide freely butclosely within the forked end of the swivel. It will be observed thatthe swivel thus applied permits the bar to play through it with freedomin a longitudinal direction, and also permits the lever-bearing to rockor swivel with respect to the feed-bar,as required by the changingposition of thelever.

The swivel applied in the manner described, admits of a close connectionbeing maintained between the parts at all times, and also admits of thesurfaces which receive the wear being readily removed and replaced inthe event of their becoming unduly worn.

The improvement causes the machine to run in aperfectl y noiselessmanner,entirely avoidin g the rattle and clatter which resulted underthe previous construction when the parts hecame slightly worn.

The fulcrum upon which the lever D turns is movable in the originalmachine lengthwise of the lever, in order to vary the distance to whichthe active end of the lever is moved, in order to increase or diminishthe rate of feed.

It is in connection with this variable stroke of th e lever that myimprovement is peculiarly advantageous,as it permits the parts to befitted closely to each other, instead of fitting them loosely, as wasrequired' in the original machine, to permit a full stroke of the lever.

The essence of the invention consists in connecting the feed-bar and itsactuating-lever by means of the swiveling plate or bearing fittedclosely to the two parts, and it is manifest that the form of the swiveland the manner of its 2. The four-motion feedbmgand the lever foractuating the same, combined with the intermediate plate fitted closelyto the lever and I 5 pivoted to the feed-bar, substantially as describedand shown.

connection with the other parts may be varied, as required, withoutdeparting from the limits of the invention.

Having thus described my invention, What I claim is- 1. The feed-bar andthe aetnatinglever, provided with the inclined surface to raise the dogin combination with the intermediate plate, F, havingapivotal connectionwith one of said members and a sliding connection with the other in theform and manner substantially as shown and described.

JO HN HOEFLER.

J. M. BELLING ER,

{ Witnesses:

} R. S. I'IALL. i

